Minarelli Horizontal 50cc Racing Crankshaft 10mm / 12mm
Minarelli Horizontal 50cc Racing Crankshaft – 10mm / 12mm Pin
Ruizheng Racing supplies racing crankshaft assemblies for Minarelli Horizontal 50cc two-stroke scooter engines, with 10mm and 12mm piston pin options and a 39.2mm standard stroke.
- Engine Platform: Minarelli Horizontal 2-Stroke
- Engine Applications: 50cc / Selected Modified 70cc Projects
- Stroke: 39.2mm (Standard)
- Connecting Rod Length: 80mm
- Piston Pin Options: 10mm / 12mm
- Needle Bearing Sizes: 10 × 14 × 13mm / 12 × 17 × 15mm
- Applications: Yamaha Aerox 50, Jog 50, MBK Nitro 50 and compatible engines
- MOQ: 300 pcs
- Customization: OEM/ODM, Custom Drawings, Logo and Packaging
B2B wholesale supply. Confirm your engine version and piston pin size before ordering.
Description
Minarelli Horizontal 50cc Crankshaft from Ruizheng Racing is a racing crankshaft assembly for two-stroke scooter engines. Available with 10mm and 12mm piston pin options, this product features a 39.2mm standard stroke and an 80mm connecting rod. Ruizheng Racing offers B2B wholesale supply and OEM/ODM customization, with a minimum order quantity of 300 pcs.
Main application references include Yamaha Aerox 50, Jog 50, MBK Nitro 50 and compatible Minarelli Horizontal engine platforms. Final fitment must be confirmed according to engine version, piston pin diameter and installation dimensions.
Minarelli Horizontal 50cc Crankshaft Specifications
| Brand | Ruizheng Racing |
|---|---|
| Product Name | Minarelli Horizontal 50cc Racing Crankshaft |
| Product Type | Motorcycle Racing Crankshaft Assembly |
| Engine Platform | Minarelli Horizontal |
| Engine Type | 2-Stroke, Single Cylinder |
| Engine Applications | 50cc / Selected Modified 70cc Projects |
| Cooling System | Air-Cooled / Liquid-Cooled Engine Versions, Subject to Fitment Verification |
| Crankshaft Stroke | 39.2mm – Standard Stroke |
| Crank Throw | 19.6mm |
| Connecting Rod Length | 80mm Center-to-Center |
| Piston Pin Options | 10mm / 12mm |
| 10mm Pin Bearing Size | 10 × 14 × 13mm |
| 12mm Pin Bearing Size | 12 × 17 × 15mm |
| Ignition Side Shaft Diameter | 20mm Nominal |
| Transmission Side Shaft Diameter | 20mm Nominal |
| OEM/ODM | Custom Specifications Available for Review |
| Minimum Order Quantity | 300 pcs |
| Price | Request Wholesale Quotation |
All dimensions are based on the supplied product information. Shaft geometry, bearing inclusion, material, assembly configuration and installation clearances must be verified before production or ordering.
10mm and 12mm Piston Pin Crankshaft Options
Ruizheng Racing offers two piston pin configurations for this Minarelli Horizontal racing crankshaft. Buyers should choose the correct option according to their piston assembly and engine requirements.
Minarelli Horizontal 10mm Crankshaft
The 10mm piston pin configuration uses a specified 10 × 14 × 13mm small-end needle bearing size. It is intended for compatible Minarelli Horizontal two-stroke engine projects requiring a 10mm piston pin.
Minarelli Horizontal 12mm Crankshaft
The 12mm piston pin configuration uses a specified 12 × 17 × 15mm small-end needle bearing size. This option is offered for compatible engine and piston configurations requiring a 12mm pin.
Important: The 10mm and 12mm versions are different configurations and must not be assumed interchangeable. The bearing dimensions do not confirm that a bearing is included in the delivered crankshaft assembly.
39.2mm Standard Stroke and 80mm Connecting Rod
The Minarelli Horizontal 50cc Crankshaft uses a standard 39.2mm stroke, corresponding to a 19.6mm crank throw. The connecting rod center-to-center length is 80mm.
These dimensions are commonly used in Minarelli Horizontal 50cc two-stroke engine configurations. A standard-stroke crankshaft should not be confused with a long-stroke or stroker crankshaft.
Buyers should confirm crankshaft shaft-end geometry, bearing seats, piston pin diameter, connecting rod dimensions and engine-case compatibility before ordering.
Yamaha Aerox 50, Jog 50 and Other Applications
This racing crankshaft is intended for compatible Minarelli Horizontal two-stroke engine platforms. Common application references include the following models.
| Brand | Application References |
|---|---|
| Yamaha | Aerox 50 2T, Jog 50, Jog R, Jog RR 50, Neo’s 50 2T, Vino 50 2T |
| MBK | Nitro 50, Ovetto 50, Mach G 50 |
| Malaguti | F10 50, F12 Phantom 50, F15 Firefox 50 |
| Aprilia | SR50, Rally 50, Sonic 50 – Selected Minarelli Engine Versions |
| Beta | Ark 50, Eikon 50 |
| Italjet | Dragster 50 |
| Benelli | 491 50, K2 50 |
These are engine-platform application references, not a guarantee of direct installation in every vehicle listed.
Some motorcycle and scooter models were produced with different engine versions, including different cooling arrangements and crankshaft configurations. Buyers must confirm the installed engine, model year, original crankshaft measurements and required piston pin size.
50cc and Modified 70cc Engine Applications
This Minarelli Horizontal racing crankshaft can be considered for compatible standard-stroke 50cc engines and selected modified 70cc performance projects.
For modified 70cc applications, the complete engine configuration must be reviewed. Cylinder and piston selection, piston pin dimensions, crankshaft geometry, bearing requirements and installation clearance can affect compatibility.
The availability of a 10mm or 12mm option does not automatically establish compatibility with every 70cc cylinder kit.
No specific horsepower increase, RPM limit or racing durability claim is made without verified technical testing for the relevant configuration.
OEM/ODM Custom Racing Crankshaft Services
Ruizheng Racing supports custom motorcycle crankshaft sourcing and development projects for distributors, aftermarket parts brands, performance workshops and engine builders.
Custom requirements may include piston pin specifications, connecting rod dimensions, crankshaft geometry, approved materials, logo marking and private-label packaging.
Customers can provide samples, drawings or detailed technical specifications for evaluation. Final manufacturing methods, tolerances, inspection criteria and order requirements are established through the project approval process.
Learn more about our OEM/ODM Motorcycle Engine Parts Services.
Wholesale Minarelli Horizontal Crankshaft Supply
Ruizheng Racing supplies motorcycle engine components for B2B customers, including wholesalers, importers, motorcycle parts distributors, performance brands and professional engine workshops.
The minimum order quantity for this Minarelli Horizontal 50cc Crankshaft is 300 pcs.
Wholesale quotations depend on the selected 10mm or 12mm configuration, order quantity, approved technical requirements and customization scope.
Browse our Racing Motorcycle Crankshaft Collection for additional models and custom crankshaft sourcing options.
Minarelli Horizontal 50cc Crankshaft FAQ
What piston pin sizes are available?
Two options are available: 10mm and 12mm. The required size should be confirmed from the original piston and connecting rod configuration.
What is the crankshaft stroke?
The listed crankshaft has a standard 39.2mm stroke and an 80mm connecting rod center-to-center length.
Can this crankshaft fit Yamaha Aerox 50?
Yamaha Aerox 50 is a main application reference for compatible Minarelli Horizontal engine versions. Final fitment requires confirmation of engine type, year and installation dimensions.
Does this crankshaft fit both air-cooled and liquid-cooled engines?
Both cooling-system categories are application references. Compatibility must be checked against the specific engine platform and crankshaft configuration before ordering.
Can the crankshaft be used with a 70cc cylinder kit?
Selected modified 70cc projects can be evaluated. Compatibility depends on the piston, cylinder, crankshaft and complete engine configuration.
Are needle bearings included?
The listed 10 × 14 × 13mm and 12 × 17 × 15mm dimensions identify the relevant small-end bearing sizes. Bearing inclusion must be confirmed with the final supply configuration.
Can Ruizheng Racing provide customized crankshafts?
Yes. Custom crankshaft projects can be reviewed using approved technical drawings, samples or dimensional requirements.
What is the minimum wholesale order quantity?
The MOQ is 300 pcs. Please provide your company name, country, required piston pin size and purchase quantity when requesting a quotation.
Request a Wholesale Crankshaft Quote
Looking for Minarelli Horizontal 50cc crankshafts for your motorcycle parts business? Contact Ruizheng Racing with your required 10mm or 12mm configuration, engine model, purchase quantity and customization details.
Compatible Brand
Yamaha
